Ok, so this happened on the way to work, so I haven't gotten home to pull out the shop manual. Went to honk at a car pulling out in front of me and after a long delay, the high tone followed by the low tone sounded. I tried to replicate this and got only a click from what I can imagine is the horn relay. Of course, the appointment I have to get it inspected is tomorrow. Any ideas? It's one of my '87 Caprice's that did this.
Check The Ground One idea is to check the horn's ground connection. There may be rust or something that is preventing a good electrical ground. Good luck!
Ground is #1. FWIW; I had the same thing happen to my Caprice. I found both horns were badly corroded. Had to replace both of them. Had a heck of a time finding good used ones; everything in the local JY was as bad - or worse - than mine. Lucked out and found a Cadillac Fleetwood that had obviously not come from Michigan in the yard; horns were like new.
Ok- I found the problem(s). The main power to the connector that goes to the horns was corroded, and each connector to the horns were the same. I cleaned the ground while I was at it. I was surprised as it was a garaged car, but hey- easy fix. Thanks eyerybody. It passed the state inspection with flying colors too! Both mechanics liked it and one asked if he could take pictures of it as well. Wasn't expecting that- thought that was pretty neat.
